initial commit

tridoraemu/irqc.go

@@ -0,0 +1,29 @@
+// Copyright 2021-2024 Sebastian Lederer. See the file LICENSE.md for details
+package main
+import (
+	"time"
+	// "fmt"
+)
+
+const MSecsPerTick = 50
+
+type IRQC struct {
+	start time.Time
+}
+
+func (i *IRQC) initialize() {
+	i.start = time.Now()
+}
+
+func (i *IRQC) read(byteaddr word) (word, error) {
+	elapsedms := time.Since(i.start).Milliseconds()
+	elapsedTicks := elapsedms / MSecsPerTick
+	result := word((elapsedTicks & 0x0FFFFFFF) << 8)
+	//fmt.Printf("** IRQC read: %08X (%v)\n", result, elapsedms)
+	return result, nil
+}
+
+func (i *IRQC) write(value word, byteaddr word) (error) {
+	return nil
+}
+